package com.example.mediarecorder;
import java.io.File;
import java.io.IOException;
import java.util.Timer;
import java.util.TimerTask;
 
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Point;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.media.MediaRecorder;
import android.media.MediaRecorder.OnErrorListener;
import android.os.Environment;
import android.util.AttributeSet;
import android.view.Display;
import android.view.LayoutInflater;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.SurfaceView;
import android.view.WindowManager;
import android.widget.LinearLayout;
import android.widget.ProgressBar;
 
import com.lidroid.xutils.util.LogUtils;
 
/**
 * 视频播放控件
 * 
 * @author 胡汉三
 * 
 */
public class MovieRecorderView extends LinearLayout implements OnErrorListener {
 
    private SurfaceView mSurfaceView;
    private SurfaceHolder mSurfaceHolder;
    private ProgressBar mProgressBar;
 
    private MediaRecorder mMediaRecorder;
    private Camera mCamera;
    private Timer mTimer;// 计时器
    private OnRecordFinishListener mOnRecordFinishListener;// 录制完成回调接口
 
    private int mWidth;// 视频分辨率宽度
    private int mHeight;// 视频分辨率高度
    private boolean isOpenCamera;// 是否一开始就打开摄像头
    private int mRecordMaxTime;// 一次拍摄最长时间
    private int mTimeCount;// 时间计数
    private File mVecordFile = null;// 文件
 
    public MovieRecorderView(Context context) {
        this(context, null);
    }
 
    public MovieRecorderView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }
 
    @SuppressWarnings("deprecation")
	public MovieRecorderView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        Point size = new Point();
        Display display = wm.getDefaultDisplay();
        display.getSize(size);
        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.MovieRecorderView, defStyle, 0);
        mWidth = a.getInteger(R.styleable.MovieRecorderView_width, 320);// 默认320
        mHeight = a.getInteger(R.styleable.MovieRecorderView_height, 240);// 默认240
         
        isOpenCamera = a.getBoolean(R.styleable.MovieRecorderView_is_open_camera, true);// 默认打开
        mRecordMaxTime = a.getInteger(R.styleable.MovieRecorderView_record_max_time, 20);// 默认为10
  
        LayoutInflater.from(context).inflate(R.layout.movie_recorder_view, this);
        mSurfaceView = (SurfaceView) findViewById(R.id.surfaceview); 
        mProgressBar = (ProgressBar) findViewById(R.id.progressBar);
        mProgressBar.setMax(mRecordMaxTime);// 设置进度条最大量
 
        mSurfaceHolder = mSurfaceView.getHolder();
        mSurfaceHolder.addCallback(new CustomCallBack());
        mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
 
        a.recycle();
    }
 
    /**
     * 
     * @author 胡汉三
     * 
     */
    private class CustomCallBack implements Callback {
 
        @Override
        public void surfaceCreated(SurfaceHolder holder) {
            if (!isOpenCamera)
                return;
            try {
                initCamera();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
 
        @Override
        public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
 
        }
 
        @Override
        public void surfaceDestroyed(SurfaceHolder holder) {
            if (!isOpenCamera)
                return;
            freeCameraResource();
        }
 
    }
 
    /**
     * 初始化摄像头
     * 
     * @author 胡汉三
     * @throws IOException
     */
    private void initCamera() throws IOException {
        if (mCamera != null) {
            freeCameraResource();
        }
        try {
            mCamera = Camera.open();
        } catch (Exception e) {
            e.printStackTrace();
            freeCameraResource();
        }
        if (mCamera == null)
            return;
 
        setCameraParams();
        mCamera.setDisplayOrientation(90);
        mCamera.setPreviewDisplay(mSurfaceHolder);
        mCamera.startPreview();
        mCamera.unlock();
    }
 
    /**
     * 设置摄像头为竖屏
     * 
     * @author 胡汉三
     */
    private void setCameraParams() {
        if (mCamera != null) {
            Parameters params = mCamera.getParameters();
            params.set("orientation", "portrait");
            mCamera.setParameters(params);
        }
    }
 
    /**
     * 释放摄像头资源
     * 
     * @author 胡汉三
     */
    private void freeCameraResource() {
        if (mCamera != null) {
            mCamera.setPreviewCallback(null);
            mCamera.stopPreview();
            //mCamera.lock();  
            mCamera.release();
            mCamera = null; 
        }   
    }  
 
    private void createRecordDir() {
        File sampleDir = new File(Environment.getExternalStorageDirectory() + File.separator + "im/video/");
        if (!sampleDir.exists()) {
            sampleDir.mkdirs();
        }
        File vecordDir = sampleDir;
        // 创建文件
        try {
            mVecordFile = File.createTempFile("recording", ".mp4", vecordDir);//mp4格式
            LogUtils.i(mVecordFile.getAbsolutePath()); 
        } catch (IOException e) {
        }
    }
  
    /**
     * 初始化
     * 
     * @author 胡汉三
     * @throws IOException
     */
    private void initRecord() throws IOException {
        mMediaRecorder = new MediaRecorder();
        mMediaRecorder.reset();
        if (mCamera != null)
            mMediaRecorder.setCamera(mCamera);
        
        mMediaRecorder.setOnErrorListener(this);
        mMediaRecorder.setPreviewDisplay(mSurfaceHolder.getSurface());
          
        // 设置从摄像头采集图像  
        mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
        // 设置从麦克风采集声音(或来自录像机的声音AudioSource.CAMCORDER)
        mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        // 设置视频文件的输出格式
        // 必须在设置声音编码格式、图像编码格式之前设置 
        mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
        // 设置声音编码的格式  
        mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
       /* mMediaRecorder.setAudioChannels(1);//1单声道 2 多声道  
        mMediaRecorder.setAudioSamplingRate(12500); //设置录制的音频采样率——频率越高，音质越好   
        mMediaRecorder.setAudioEncodingBitRate(16); // 设置录制的音频编码比特率
*/        mMediaRecorder.setVideoEncodingBitRate(1 * 1024 * 1024);// 设置帧频率，然后就清晰了
        mMediaRecorder.setOrientationHint(90);// 输出旋转90度，保持竖屏录制   
        // 设置图像编码的格式           
        mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
        mMediaRecorder.setVideoSize(mWidth, mHeight);
        // 每秒 4帧       
        //mMediaRecorder.setVideoFrameRate(20);        
        mMediaRecorder.setOutputFile(mVecordFile.getAbsolutePath());
        mMediaRecorder.prepare();  
        try {  
            mMediaRecorder.start();
        } catch (IllegalStateException e) {
            e.printStackTrace();
        } catch (RuntimeException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
 
    /**
     * 开始录制视频
     * 
     * @author 胡汉三
     * @param fileName
     *            视频储存位置
     * @param onRecordFinishListener
     *            达到指定时间之后回调接口
     */
    public void record(final OnRecordFinishListener onRecordFinishListener) {
        this.mOnRecordFinishListener = onRecordFinishListener;
        createRecordDir();
        try {
            if (!isOpenCamera)// 如果未打开摄像头，则打开
                initCamera();
            initRecord();
            mTimeCount = 0;// 时间计数器重新赋值
            mTimer = new Timer();
            mTimer.schedule(new TimerTask() {
 
                @Override
                public void run() {
                    mTimeCount++;
                    mProgressBar.setProgress(mTimeCount);// 设置进度条
                    if (mTimeCount == mRecordMaxTime) {// 达到指定时间，停止拍摄
                        stop();
                        if (mOnRecordFinishListener != null)
                            mOnRecordFinishListener.onRecordFinish();
                    }
                }
            }, 0, 1000);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
 
    /**
     * 停止拍摄
     * 
     * @author 胡汉三
     */
    public void stop() {
        stopRecord();
        releaseRecord();
        freeCameraResource();
    }
 
    /**
     * 停止录制
     * 
     * @author 胡汉三
     */
    public void stopRecord() {
        mProgressBar.setProgress(0);
        if (mTimer != null)
            mTimer.cancel();
        if (mMediaRecorder != null) {
            // 设置后不会崩
            mMediaRecorder.setOnErrorListener(null);
            mMediaRecorder.setPreviewDisplay(null);
            try {
                mMediaRecorder.stop();
            } catch (IllegalStateException e) {
                e.printStackTrace();
            } catch (RuntimeException e) {
                e.printStackTrace();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
 
    /**
     * 释放资源
     * 
     * @author 胡汉三
     */
    private void releaseRecord() {
        if (mMediaRecorder != null) {
            mMediaRecorder.setOnErrorListener(null);
            try {
                mMediaRecorder.release();
            } catch (IllegalStateException e) {
                e.printStackTrace();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        mMediaRecorder = null;
    }
 
    public int getTimeCount() {
        return mTimeCount;
    }
 
    /**
     * @return the mVecordFile
     */
    public File getmVecordFile() {
        return mVecordFile;
    }
 
    /**
     * 录制完成回调接口
     *
     * @author 胡汉三
     * 
     */
    public interface OnRecordFinishListener {
        public void onRecordFinish();
    } 
 
    @Override
    public void onError(MediaRecorder mr, int what, int extra) {
        try {
            if (mr != null)
                mr.reset();
        } catch (IllegalStateException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}